Foraminous baffle for pot-type burners



June 13, 1944.

J. L. BREESE 2,351,480

'FORAMINOUS BAFFLEFOR POT TYPE BURNERS Filed April 11. 1941 [73 21572 0} Jame 5 l.B7'e e,5e.

gQAlHJ- Z Patented June 13, 1944 EORAMINOUS RAFFLE FOR- POT-TYPE BURNERS James L. Breese, Santa Fe, N. Mex., assignmto Oil Devices, Santa Fe, N. Mex., a limited partnership of Illinois Application April 11, 1941, Serial No. 388,073

4 Claims.

My invention relates to an improvement in liquid hydrocarbon burners, and has for one purpose the provision of improved baille means for employment in pot type burners.

Another purpose is to provide a baille ring which prevents smoking at any stage of the fire and which produces a very clean, blue flame.

Other purposes will appear from time to time in the course of the specification.

I illustrate my invention more or less diagrammatically in the accompanying drawing wherein:

Fig. l is a vertical axial section; and

Fig. 2 is a section on the line 2-2 of Fig. 1.

Like parts are indicated by like symbols throughout the specification and drawing.

Referring to the drawing, I is an outer heater drum or housing. It may be mounted for example on legs 2, as shown, with a bottom 3 having an air inlet aperture 4. 5 is a supporting ring positioned within the drum I. Supported thereupon is a pot 6, having 9. preferably concave bottom I. The pot may have an outwardly extending flange 8 to rest upon an upturned inner flange of the ring 5. 9 is any suitable removable flre ring having a central aperture, as at III. II is any suitable fuel inlet means in communication with the fuel pipe II, which may be controlled by any suitable valve, herein illustrated as at l3.

It will be understood that any suitable valve control means may be employed, whether automatic or manual "control, in order that the volume of flow of liquid hydrocarbon upon the pot bottom 1 may be varied. A side of the pot 6 is provided with a plurality of primary air inlet apertures l4, herein shown as located in horizontal rows at various levels. Secondary air may be admitted adjacent the top of the pot by any suitable means. I illustrate the row of larger and more closely spaced air inlets l5.

l8 indicates a baflle herein shown as an inverted truncated cone, centrally apertured as at H. Its outer edge clears the opposed inner face of the po as at l8, to provide a circumferential space. I! indicates any suitable supporting and centering pins, or the like. It will be understood, however, that the bame may be supported in any other suitable manner, and that the pins I! are merely illustrative of a practical support. The baille I8 is shown as located just below the secondary air apertures l5. It is provided with a plurality of small air apertures 20, which are distributed generally uniformly throughout the area of the ring. 1

The liquid hydrocarbon admitted through the passage H is vaporized in response to the heat of combustion in the pot. The vaporized hydrocarbon rises in the pot and becomes mixed up with the primary air flowing in through the primary air inlets to form a primary incompletely combustible mixture. The primary mixture then rises in the pot until it is mixed with a secondary air supply which flows in through the apertures l5, and when the pot is at high fire, combustion takes place at or above the level of the secondary air inlet apertures IS. The fire is controlled by varying the supply of liquid hydrocarbon, for example by the control of any suitable valve, such as II.

It will be realized that, whereas I have described and illustrated a practical and operative device,

nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to my precise showing.

For example, a wide latitude is possible in the formation of the baffle rings and the arrangement of the apertures therein. The rings may be stamped or otherwise formed out of foraminous sheet metal. However, I prefer to employ pre-formed rings and to punch the holes into them. It will be observed that the apertures, as shown in Fig. 2, are aligned radially and are also arranged in concentric rings. While this arrangement is practical, it can, of course, be varied.

It will be noted that the baille Ii is downwardly conic. This is under many circumstances advantageous but is not necessary. The diameter of the central aperture of the baille I6 is shown as substantiallly exceeding the radial width of the rin itself.

I claim:

1. In combination with a burner pot having a substantially cylindrical side wall provided with a plurality of primary air inlet apertures located at various levels and with secondary air inlet means adjacent the top of the pot, means for deliverying a liquid fuel to the bottom of the pot, and a baiile located between the primary air inlet apertures and the secondary air inlet means, said baille including a thin annular body having a large central aperture the diameter of which substantially exceeds the radial width of the surrounding annulus, said annulus being provided throughout its area with a plurality of generally uniformly spaced small apertures.

2. In combination with a burner pot having a substantially cylindrical side wall provided with a plurality of primary air inlet apertures, and with secondary air inlet means adjacent the top of the pot, a centrally apertured flame ring partially closing the top of the pot, means for delivering liquid fuel to the pot, a baille located above the primary air inlet apertures and below-the secondary air inlet means, said baffle including a thin annular body having a large central aperture. said annular body being provided throughout its area with a plurality. of generally uniformly spaced small apertures.

3. In combination with a burner pot having a substantially cylindrical side wall provided with a plurality of primary air inlet apertures, and with secondary air inlet means adjacent the top of the pot, a centrally apertured flame ring partially closing the top of the pot, means for delivering liquid fuel to the pot, a baille located above the primary air inlet apertures and below the secondary air inlet means, said baflle including a thin annular body having a'large central aperture, said annular body being provided throughout its area with a plurality of generally uniiormly spaced small apertures, the central aperture of the baiile being of substantially smaller diameter than the central aperture of the flame substantially cylindrical side wall provided with a plurality of primary air inlet apertures, and with secondary air inlet means adjacent the top of the pot, a centrally apertured flame ring partially closing the top 01' the pot, means for delivering liquid fuel to the pot, a baiiie located above the primary air inlet apertures and below the secondary air inlet means, said baiiie including a thin annular body having a large central'aperture, said annular body being provided throughout its area with a plurality of generally uniiormly spaced small apertures, and the baflle being downwardly frusto conic.

JAMES L. BREESE. 

